Method for pyrolyzing livestock and poultry manure biogas residue and application thereof

Abstract

The application discloses a method for pyrolyzing livestock and poultry manure biogas residue and application thereof, and belongs to the field of agricultural and forestry biomass waste resource utilization. In view of the problems of livestock and poultry manure source biogas residue disposal difficulty and large opening obstacle, the application provides a method for pyrolyzing livestock and poultry manure biogas residue, namely 1) low-temperature anaerobic pyrolysis, 2) calcium / magnesium hydroxide assisted high-temperature anaerobic pyrolysis, and 3) sodium / potassium hydroxide assisted high-temperature anaerobic pyrolysis, so that the preparation of carbon-based materials based on livestock and poultry manure source biogas residue is realized, and the carbon-based materials have developed pore structure, less pollutant residue and high phthalate adsorption efficiency. The application provides a new way for high-value resource utilization of livestock and poultry manure source biogas residue, and provides a new type of efficient adsorbent for water environmental pollutant treatment.

Description

Technical Field

[0001] This application belongs to the field of agricultural and forestry waste carbon treatment technology, specifically relating to a method for pyrolyzing livestock and poultry manure biogas residue and its application. Background Technology

[0002] my country generates over 5 billion tons of agricultural, forestry, and livestock biomass waste annually, with livestock manure accounting for the largest share. This waste easily causes non-point source pollution and other environmental problems, urgently requiring rapid reduction and disposal. From the perspective of material and energy cycles, livestock manure can be considered a resource in the wrong place, and its high-value resource utilization is an inevitable trend. However, how to achieve high-value resource utilization of livestock manure is a global challenge and pain point.

[0003] Among existing methods for treating livestock and poultry manure, anaerobic fermentation is highly favored. In recent years, with the significant increase in large-scale farms, biogas projects in intensive farms have developed rapidly, solving the livestock and poultry manure problem to some extent and providing clean energy for surrounding residents. However, many problems remain regarding the treatment of post-fermentation residues. Biogas residue is the recalcitrant organic matter remaining after highly anaerobic fermentation of livestock and poultry manure. The characteristics and treatment difficulties of livestock and poultry manure lie in its content of heavy metals and antibiotics, among other organic pollutants. After anaerobic fermentation, heavy metals and organic pollutants are further concentrated in the biogas residue, severely limiting its high-value resource utilization.

[0004] In recent years, the preparation of carbon-based materials from agricultural, forestry, and livestock biomass waste through pyrolysis has become a mainstream approach, achieving a dual benefit: carbon sequestration and pollution reduction. However, the pore structure of carbon-based materials derived from direct one-step pyrolysis of biomass residue is underdeveloped. Nevertheless, the pore structure of carbon-based materials is a key parameter determining their performance and economic value. Hydroxides are typical high-efficiency activators that can induce pores during biomass pyrolysis, further expanding the pore structure. However, existing research indicates that classic hydroxide activators are difficult to apply to the preparation of porous carbon materials from biomass residue. For example, research by Talam Kibona Enock et al. showed that KOH activator only increased the specific surface area by 3.5 times, reaching a maximum of 514.7 m². 2 / g(Biogas-slurry-derived mesoporous carbon for supercapacitor applications, Materials Today Energy, 2017, 5: 126-137). For typical livestock and poultry manure-derived biogas residue, improving its pore structure is even more challenging. For example, in the study by Xia et al., using pig manure-derived biogas residue as a precursor, KOH activator only increased the specific surface area by 1.6 times, reaching a maximum of 115.8 m². 2 / g; Although ZnCl2 has a better pore-forming effect, the high content of heavy metal Zn will limit the application of biogas residue-derived carbon-based materials in environmental remediation (Mesoporous activated biochar for As(III) adsorption: A new utilization approach for biogas residue, Industrial & Engineering Chemistry Research, 2019, 38: 17859–17870). In addition, biogas residue from livestock and poultry manure sources itself contains heavy metals and organic pollutants. Removing them during the pyrolysis process is the basis and prerequisite for using its derived carbon-based materials for environmental remediation.

[0005] Application content

[0006] 1. The problem to be solved

[0007] This application addresses one of the problems of difficult resource utilization and large opening obstacles in livestock and poultry manure biogas residue, and provides a method for pyrolyzing livestock and poultry manure biogas residue. This method greatly improves the porosity of its carbon-based material, thereby enhancing its adsorption capacity. In addition, the pyrolysis method of this application can remove a large amount of heavy metals and organic pollutants from the biogas residue, transforming it into green and sustainable carbon-based materials.

[0008] 2. Technical Solution

[0009] To solve the above problems, the technical solution adopted in this application is as follows:

[0010] This application provides a method for pyrolyzing livestock and poultry manure biogas residue, which specifically includes the following steps:

[0011] (1) Low-temperature carbonization: The fermented livestock and poultry manure residue is dried, crushed to 80-120 mesh, heated to 300-600℃ under nitrogen protection, and carbonized for 4.0-8.0h. After cooling to room temperature, it is ground to 80-120 mesh to obtain solid product CO.

[0012] (2) High-temperature carbonization assisted by hydroxide A: CO is mixed with hydroxide A, heated to 800-1200℃ under nitrogen protection, and carbonized for 1.0-2.0h. After cooling to room temperature, it is ground to 80-120 mesh, rinsed and dried to obtain solid product C1.

[0013] (3) High-temperature carbonization assisted by hydroxide B: C1 is mixed with hydroxide B, heated to 800-1200℃ under nitrogen protection, and carbonized for 1.0-2.0h. After cooling to room temperature, it is ground to 80-120 mesh, rinsed and dried to obtain solid product C2.

[0014] Among them, the thermal decomposition intensity and the size of the thermal decomposition derivative of hydroxide A are greater than those of hydroxide B.

[0015] Furthermore, the livestock and poultry manure biogas residue after fermentation in step (1) above is livestock and poultry manure biogas residue after highly anaerobic fermentation. Highly anaerobic fermentation easily decomposes organic matter into methane or humic acid-like substances.

[0016] Furthermore, the drying temperature in steps (1) to (3) above is 105°C.

[0017] Furthermore, the dried biogas residue from step (1) above is pulverized to 100 mesh.

[0018] Furthermore, the heating rate in step (1) above is 2–6 °C / min. Even further, the heating rate is 5 °C / min.

[0019] Furthermore, the nitrogen flow rate during heating in step (1) above is 0–500 mL / min. Even further, the nitrogen flow rate is 200 mL / min.

[0020] Furthermore, in step (1) above, the carbonization temperature is 500℃ and the carbonization time is 4h.

[0021] Furthermore, the cooling rate in step (1) above is 8–12 °C / min. Even further, the cooling rate is 10 °C / min.

[0022] Furthermore, in step (2) above, the weight ratio of hydroxide A to CO is 2:1 to 3:1. Even further, the weight ratio of hydroxide A to CO is 2:1.

[0023] Furthermore, in step (2) above, hydroxide A is one or a mixture of calcium hydroxide, iron hydroxide, and magnesium hydroxide. Such hydroxides can react violently with surface carbon elements and form a large number of mesopores (size effect of thermal decomposition derivatives).

[0024] Furthermore, the heating rate in step (2) above is 2–6 °C / min. Even further, the heating rate is 3 °C / min.

[0025] Furthermore, the nitrogen flow rate during heating in step (2) above is 10–500 mL / min. Even further, the nitrogen flow rate is 200 mL / min.

[0026] Furthermore, in step (2) above, the carbonization temperature is 900℃ and the carbonization time is 1h.

[0027] Furthermore, the cooling rate in step (2) above is 8–12 °C / min. Even further, the cooling rate is 10 °C / min.

[0028] Furthermore, the rinsing in step (2) above includes acid washing, alkali washing, acid washing, and water washing.

[0029] Furthermore, in step (3) above, the weight ratio of hydroxide B to C1 is 0.5:1 to 2:1. Even further, the weight ratio of hydroxide B to C1 is 2:1.

[0030] Furthermore, in step (3) above, hydroxide B is one or a mixture of sodium hydroxide and potassium hydroxide. Such hydroxides consume relatively little carbon and can form a large number of micropores in the mesopores formed in step (2) (size effect of thermal decomposition derivatives).

[0031] Furthermore, the heating rate in step (3) above is 2–6 °C / min. Even further, the heating rate is 3 °C / min.

[0032] Furthermore, the nitrogen flow rate during heating in step (3) above is 10–500 mL / min. Even further, the nitrogen flow rate is 200 mL / min.

[0033] Furthermore, in step (3) above, the carbonization temperature is 900℃ and the carbonization time is 1h.

[0034] Furthermore, the cooling rate in step (3) above is 8–12 °C / min. Even further, the cooling rate is 10 °C / min.

[0035] Furthermore, the rinsing in step (3) above includes acid washing, alkali washing, acid washing, and water washing.

[0036] This application also provides a carbon-based material derived from livestock and poultry manure biogas residue prepared by the above-mentioned method of pyrolysis of livestock and poultry manure biogas residue. This carbon-based material has a high specific surface area, large pore volume, and graded pore size.

[0037] Furthermore, the specific surface area of ​​the above-mentioned livestock and poultry manure biogas residue-based carbon-based material is 1247 m². 2 / g; pore volume is 0.75cm³ 3 / g; rich in mesopores and micropores, with a mesopore volume of 0.46 cm³. 3 / g, micropore volume is 0.28cm³ 3 / g.

[0038] This application also provides the application of the above-mentioned method for pyrolyzing livestock and poultry manure biogas residue in environmental remediation. This application further provides the application of the above-mentioned livestock and poultry manure biogas residue-based carbon materials in environmental remediation, used for adsorbing and removing pollutants from the environment.

[0039] Furthermore, the above-mentioned application in environmental remediation refers to the remediation of water bodies contaminated with phthalic acid esters.

[0040] 3. Beneficial effects

[0041] Compared with the prior art, the advantages of this application are as follows:

[0042] (1) This application provides a method for pyrolyzing livestock and poultry manure sludge, comprising low-temperature carbonization, high-temperature carbonization assisted by hydroxide A, and high-temperature carbonization assisted by hydroxide B. The pyrolysis intensity and size of the pyrolysis derivatives of hydroxide A are greater than those of hydroxide B, which can transform livestock and poultry manure sludge into a carbon-based material with a well-developed pore structure. During pyrolysis, low-temperature carbonization can directly remove easily decomposable carbon components from the sludge, avoiding the consumption of hydroxides; it also plays a shaping role, fixing the pore structure of the outer surface, providing sufficient reaction sites for hydroxide A, and improving the reaction effect. High-temperature carbonization assisted by hydroxide A can consume easily reactive carbon components on the outer surface; furthermore, hydroxide A reacts more vigorously with carbon, has a high efficiency in removing surface-obstructing carbon components, and its derived metal salt molecules are larger in size, which helps in the formation of mesopores and macropores, providing mass transport channels and effective internal reaction sites for the activation of hydroxide B. High-temperature carbonization assisted by hydroxide B can generate a large number of micropores based on the pore structure.

[0043] (2) The method for pyrolyzing livestock and poultry manure biogas residue provided by the present invention can optimize the pore structure based on pore expansion, with mesopores and micropores merging and coexisting. As shown in Example 1, the carbon-based material obtained has a specific surface area as high as 1247 m². 2 / g; pore volume is 0.75cm³ 3 / g; and it is rich in both mesopores and micropores, with a mesopore volume of 0.46cm³. 3 / g, micropore volume is 0.28cm³ 3 / g.

[0044] (3) The present invention provides a method for thermally pyrolyzing livestock and poultry manure sludge. Two high-temperature carbonization coupled with acid washing can remove heavy metals, ash and organic pollutants in large quantities, and can convert livestock and poultry manure sludge into carbon-based materials with low ash content and low content of heavy metals and organic pollutants.

[0045] (4) The carbon-based material produced by the pyrolysis of livestock and poultry manure biogas residue provided by the present invention can be used in the remediation of organic pollutants in water bodies. It can efficiently adsorb phthalic acid ester organic pollutants and achieve the dual functions of carbon fixation and pollution reduction. As shown in Example 4, the adsorption capacity of P1C2 is much higher than that of P1C0 and P1C1, reaching 277 mg / g, which is 36 times the adsorption capacity of carbon-based material (P1C0) directly pyrolyzed in one step, and 16 times the adsorption capacity of carbon-based material (P1C1) after conventional activation treatment. Attached Figure Description

[0046] Figure 1The nitrogen adsorption-desorption isotherms (a) and pore size distribution diagram (b) of the livestock and poultry manure biogas residue source carbon-based materials (P1C0, P1C1 and P1C2) in Example 1 are shown.

[0047] Figure 2 Scanning electron microscope (SEM) images of the livestock and poultry manure biogas residue-based carbon materials (P1C0, P1C1, and P1C2) in Example 1.

[0048] Figure 3 The image shows the XRD patterns of the livestock and poultry manure biogas residue source carbon-based materials (P1C0, P1C1 and P1C2) in Example 1.

[0049] Figure 4 This is an adsorption kinetic diagram of diethyl phthalate (DEP) in phthalate esters by the livestock and poultry manure biogas residue source carbon-based materials (P1C0, P1C1 and P1C2) in Example 1. Detailed Implementation

[0050] The present application will be further described below with reference to specific embodiments.

[0051] It should be noted that terms such as "upper", "lower", "left", "right", and "middle" used in this specification are only for clarity of description and are not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of this application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0053] Unless otherwise specified in the examples, the procedures should be performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0054] As used herein, the term “about” is used to provide for the flexibility and imprecision associated with a given term, measure, or value. Those skilled in the art can readily determine the degree of flexibility for a particular variable.

[0055] As used herein, the term “at least one of…” is intended to be synonymous with “one or more of…”. For example, “at least one of A, B, and C” explicitly includes only A, only B, only C, and combinations thereof.

[0056] Concentration, amount, and other numerical data may be presented in range format herein. It should be understood that such range format is used solely for convenience and brevity and should be flexibly interpreted to include not only the values ​​explicitly stated as the limits of the range, but also all individual values ​​or subranges encompassed within the range, as if each value and subrange were explicitly stated. For example, a range of values ​​from about 1 to about 4.5 should be interpreted to include not only the explicitly stated limits of 1 to 4.5, but also individual numbers (such as 2, 3, 4) and subranges (such as 1 to 3, 2 to 4, etc.). The same principle applies to ranges that describe only a single value, such as “less than about 4.5,” which should be interpreted to include all the aforementioned values ​​and ranges. Furthermore, this interpretation should apply regardless of the breadth of the range or characteristic described.

[0057] Example 1

[0058] This embodiment provides a method for pyrolyzing livestock and poultry manure biogas residue, including the following steps:

[0059] (1) Low-temperature carbonization: The highly anaerobic fermented pig manure biogas residue was placed in an oven, dried at 105℃, crushed to 100 mesh, placed in a muffle furnace, nitrogen flow rate of 200 mL / min, temperature increased by 5℃ / min, carbonized at 500℃ for 4 hours, cooled (10℃ / min) to room temperature, and then taken out and ground to 100 mesh to obtain solid product P1CO.

[0060] (2) High-temperature carbonization assisted by Ca(OH)2: P1CO was mixed with Ca(OH)2 (mass ratio = 1:2), placed in a muffle furnace, nitrogen flow rate was 200 mL / min, temperature was increased by 3℃ / min, carbonized at 900℃ for 1 h, cooled (10℃ / min) to room temperature, taken out, ground to 100 mesh, rinsed (acid-base-acid-water), dried, and the solid product P1CO was obtained.

[0061] (3) High-temperature carbonization assisted by KOH: P1C1 was mixed with KOH (mass ratio = 1:2), placed in a muffle furnace, nitrogen flow rate was 200 mL / min, temperature was increased by 3℃ / min, carbonized at 900℃ for 1 h, cooled (10℃ / min) to room temperature, taken out, ground to 100 mesh, rinsed (acid-alkali-water), dried, and the solid product P1C2 was obtained.

[0062] Results analysis:

[0063] Nitrogen adsorption-desorption isotherms of livestock and poultry manure biogas residue-based carbon materials (P1C0, P1C1, and P1C2) are shown below. Figure 1 As shown in (a), the specific surface area of ​​P1C2 is 1247 m². 2 / g, P1C1 has a specific surface area of ​​97m² 2 / g, P1CO has a specific surface area of ​​54m³ 2 / g. The specific surface area of ​​P1C2 is much higher than that of P1C0 and P1C1, being 23 times that of carbon-based materials directly subjected to one-step pyrolysis (P1C0) and 13 times that of carbon-based materials subjected to conventional activation treatment (P1C1). Therefore, the pyrolysis method proposed in this invention can transform livestock and poultry manure-derived biogas residue into carbon-based materials with well-developed pore structures, providing more adsorption and storage space for pollutants.

[0064] The pore size distribution diagrams of the carbon-based materials (P1C0, P1C1, and P1C2) derived from livestock and poultry manure biogas residue are shown below. Figure 1 As shown in (b), the number of mesopores in P1C2 (mesopore volume: 0.46 cm³) 3 / g) and the number of micropores (micropore volume: 0.28cm³) 3 The ratio (g) is higher than that of P1CO and P1CO. Furthermore, the high proportion of mesopores improves the effectiveness of internal pores. Therefore, the pyrolysis method proposed in this invention can prepare carbon-based materials rich in both mesopores and micropores, which is beneficial for the mass transport of pollutants.

[0065] Scanning electron microscope images of carbon-based materials (P1C0, P1C1, and P1C2) derived from livestock and poultry manure biogas residue are shown below. Figure 2 As shown, the low-temperature carbonization process helps consume easily decomposable carbon components on the surface of biogas sludge and fix the surface pore structure, providing abundant binding and reaction sites for Ca(OH)2. Under the action of Ca(OH)2, a large amount of adsorbed black carbon is consumed, the rough surface becomes smooth, and a large number of mesopores and macropores are generated. On the one hand, this provides a pathway for KOH to enter the interior for activation; on the other hand, it avoids the reaction and consumption of KOH with surface carbon, which helps to significantly improve the porosity of KOH, further corroborating the evidence. Figure 1 The result.

[0066] The XRD patterns of the carbon-based materials (P1C0, P1C1, and P1C2) derived from livestock and poultry manure biogas residue are shown below. Figure 3 As shown, the pyrolysis method for livestock and poultry manure-derived biogas residue proposed in this invention can eliminate a large amount of ash components, including a significant amount of heavy metals. The secondary high temperature also helps to eliminate organic pollutants such as antibiotics.

[0067] Example 2

[0068] This embodiment provides a method for pyrolyzing livestock and poultry manure biogas residue, including the following steps:

[0069] (1) Low-temperature carbonization: The highly anaerobic fermented pig manure biogas residue was placed in an oven, dried at 105℃, crushed to 80 mesh, placed in a muffle furnace, nitrogen flow rate was 0 mL / min, temperature was increased at 2℃ / min, carbonized at 300℃ for 8h, cooled (8℃ / min) to room temperature, and then ground to 80 mesh to obtain solid product P2CO.

[0070] (2) High-temperature carbonization assisted by Mg(OH)2: P2CO and Mg(OH)2 were mixed (mass ratio = 1:3), placed in a muffle furnace, nitrogen flow rate was 10 mL / min, temperature was increased by 2℃ / min, carbonized at 800℃ for 2h, cooled (8℃ / min) to room temperature, taken out, ground to 80 mesh, rinsed (acid-base-acid-water), dried, and the solid product P2Cl was obtained.

[0071] (3) High-temperature carbonization assisted by NaOH: P2C1 was mixed with NaOH (mass ratio = 1:0.5), placed in a muffle furnace, nitrogen flow rate was 10 mL / min, temperature was increased by 2℃ / min, carbonized at 800℃ for 2h, cooled (8℃ / min) to room temperature, taken out, ground to 80 mesh, rinsed (acid-alkali-water), dried, and the solid product P2C2 was obtained.

[0072] Example 3

[0073] This embodiment provides a method for pyrolyzing livestock and poultry manure biogas residue, including the following steps:

[0074] (1) Low-temperature carbonization: The highly anaerobic fermented pig manure biogas residue was placed in an oven, dried at 105℃, crushed to 120 mesh, placed in a muffle furnace, nitrogen flow rate of 500 mL / min, temperature increased at 6℃ / min, carbonized at 600℃ for 6h, cooled (12℃ / min) to room temperature, taken out, and ground to 120 mesh to obtain solid product P3CO.

[0075] (2) High-temperature carbonization assisted by Fe(OH)3: P3CO was mixed with Fe(OH)3 (mass ratio = 1:2.5), placed in a muffle furnace, nitrogen flow rate was 500 mL / min, temperature was increased by 6℃ / min, carbonized at 1200℃ for 1 h, cooled (12℃ / min) to room temperature, ground to 120 mesh, rinsed (acid-base-acid-water), dried, and the solid product P3Cl was obtained.

[0076] (3) High-temperature carbonization assisted by NaOH: P3C1 was mixed with NaOH (mass ratio = 2:3), placed in a muffle furnace, nitrogen flow rate was 500 mL / min, temperature was increased by 6℃ / min, carbonized at 1200℃ for 1h, cooled (12℃ / min) to room temperature, ground to 120 mesh, rinsed (acid-alkali-water), dried, and the solid product P3C2 was obtained.

[0077] Example 4

[0078] This embodiment provides the application of the carbon-based materials (P1CO, P1C1, and P1C2) prepared in Example 1 of the present invention in the remediation of diethyl phthalate (DEP) contaminated water. The specific steps are as follows:

[0079] 5 mg of pig manure biogas residue carbon-based material was mixed with DEP-contaminated water (20 mg / L) and placed in a culture flask. The mixture was then incubated at room temperature using a shaker. Samples were collected at 0, 0.5, 1, 2, 4, 8, 24, 48, and 72 h. The samples were centrifuged at high speed, and the concentration of residual DEP in the supernatant was determined by high-performance liquid chromatography. The adsorption capacity was then calculated.

[0080] The adsorption kinetics of diethyl phthalate (DEP) in phthalates by carbon-based materials (P1C0, P1C1, and P1C2) derived from livestock and poultry manure biogas residue are shown in the figure below. Figure 4 As shown, the adsorption capacity of P1C2 is much higher than that of P1C0 and P1C1, reaching 277 mg / g, which is 36 times that of the adsorption capacity of carbon-based materials directly subjected to one-step pyrolysis (P1C0) and 16 times that of carbon-based materials subjected to conventional activation treatment (P1C1). This indicates that the pyrolysis method proposed in this invention can convert livestock and poultry manure-derived biogas residue into a high-performance adsorbent / passivator for organic pollutants, reduce the risk of environmental pollution, and achieve carbon sequestration.

Claims

1. A method for pyrolyzing livestock and poultry manure biogas residue, characterized in that, Includes the following steps: (1) Low-temperature carbonization: The fermented livestock and poultry manure residue is dried, crushed to 80~120 mesh, heated to 300~600℃ under nitrogen protection, and carbonized for 4.0~8.0 h. After cooling to room temperature, it is ground to 80~120 mesh to obtain solid product CO. (2) High-temperature carbonization assisted by hydroxide A: CO is mixed with hydroxide A, heated to 800~1200℃ under nitrogen protection, and carbonized for 1.0~2.0 h. After cooling to room temperature, it is ground to 80~120 mesh, rinsed and dried to obtain solid product C1. (3) High-temperature carbonization assisted by hydroxide B: C1 is mixed with hydroxide B, heated to 800~1200℃ under nitrogen protection, and carbonized for 1.0~2.0 h. After cooling to room temperature, it is ground to 80~120 mesh, rinsed and dried to obtain solid product C2. Among them, the thermal decomposition intensity and the size of the thermal decomposition derivative of hydroxide A are greater than those of hydroxide B; hydroxide A is one or a mixture of calcium hydroxide, iron hydroxide, and magnesium hydroxide; hydroxide B is one or a mixture of sodium hydroxide and potassium hydroxide. In step (2), the weight ratio of hydroxide A to CO is 2:1 to 3:1; in step (3), the weight ratio of hydroxide B to CO is 0.5:1 to 2:

1. In step (1), the heating rate is 2~6℃ / min, the nitrogen flow rate is 0~500 mL / min, and the cooling rate is 8~12℃ / min; In steps (2) and (3), the heating rate is 2~6℃ / min; the nitrogen flow rate is 10~500 mL / min; and the cooling rate is 8~12℃ / min.

2. A carbon-based material derived from livestock and poultry manure biogas residue, characterized in that, It is prepared by the method described in claim 1.

3. The livestock and poultry manure biogas residue-based carbon-based material according to claim 2, characterized in that, The specific surface area of ​​the material is 1247 m². 2 / g; pore volume is 0.75 cm³ 3 / g; rich in mesopores and micropores, with a mesopore volume of 0.46 cm³. 3 / g, micropore volume is 0.28 cm³ 3 / g.

4. The application of the livestock and poultry manure biogas residue-based carbon-based material as described in claim 2 or 3 in environmental remediation.

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